Unable to debug framework source code


  • Hi,

    I have following setup

    *) Windows 7 64bit

    *) .net 4.0.30319 RTMRel (as reported by vs 2010)

    *) VS 2010 10.0.30319.1 RTMRel (as reported by vs 2010)

    *) Following settings to enable framework source debugging

       -unchecked "Just My Code"

     -checked ".NET Framework source stepping"

    -checked "source server support"

    -checked "Microsoft Symbol Servers"

            -unchecked Source file version mismatch option in debugging->general

    -visual studio hosting process disabled

    and following code in test app

    static void Main(string[] args)


                string s = "foobar";

                int i = s.LastIndexOf('b');


    when I try to step into LastIndexOf, I get a page "No Source Available". I can see that whenever I run the app after clearing the cache, mscorlib.pdb file gets downloaded and vs 2010 shows symbol file loaded from the same location.


    Is there any thing I am missing to enable source code debugging?




    Tuesday, October 11, 2011 11:20 AM